package com.example.testone;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;

public class XieChengActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_xie_cheng);

        Log.d("GaoChang", "主线程id：${mainLooper.thread.id}");

    }
}